JAVA API (GUI)

Subject : T0934 / Multimedia Programming FoundationSession : 1Tahun : 2009Versi : 1/0

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Learning Outcomes

In the end of this session, students must be able to: – recognize Java technology– understand the concept of

Graphics User Interfaces (GUI)– recognize the components and

user actions of GUI– recognize Look And Feel (LAF)

in Java

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Course Outlines

• Java Technology• Graphics User Interface (GUI)• User Interface Components• User Actions (Interactions)• Java GUI• User Interface Manager (Look And

Feel)

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Java Technology

• Both a programming language and a platform

• Java programming language is a high-level language that can be characterized by all of the following buzzwords:– Simple– Object Oriented– Distributed– Interpreted– Robust– Secure– Architecture Neutral– Portable– High performance– Multithreaded– Dynamic

Java Technology

• Software development process:

• JVM(multiple platforms)

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Java Technology

• Platform is the hardware or software environment in which a program runs.

• The Java platform has two components:– The Java Virtual Machine– The Java Application Programming Interface (API)

• API: Core functionality of the Java.– Classes: basic objects,

networking and security,XML generation and database access, and more

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Graphics User Interface (GUI)

• Pronounced /’ɡu:i/ “goo-ey”• Human-computer interface (way for

humans to interact with computers)• Uses windows, icons and menus• Can be manipulated by a mouse• Often to a limited extent by a

keyboard• Three Concepts:

– Graphics (text, image, geometric figures)– User Interface Components– User Actions (Interactions)

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User Interface Components

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Frame(Top-level Window)

Title Bar

Menu Bar Menu Items

Button

Combo Box

Text Field

Image Icon

Check Box

Radio Button

Tab Pane

Mnemonics

Vertical Scroll Bar

Horizontal Scroll Bar

User Actions (Interactions)

• Key• Mouse• Button• Menu

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Actions:• Press Key• Click Mouse• Click Button• Select Menu

Events:• Key Event• Mouse Event• Action Event• Action Event

PROGRAMcauses notifyListe

n Handle

User

respond

action

User

click

show click

show

Sample Code

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Sample Code

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Sample Code

• File saved as “ComponentsSample.java”

• setBounds(int x, int y, int width, int height)

• See JDK Documentation as tutorialBina Nusantara

Sample Code

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JFramesetSize(300,200);

JPanel

setTitle("Components Sample");

JLabellabel.setBounds(10,10,120,20);

JCheckBoxcheckBox.setBounds(5,40,150,20);

JTextFieldtextField.setBounds(130,10,150,20);

JComboBoxcomboBox.setBounds(160,40,120,20);

JButtonbutton.setBounds(210,80,70,20);

Java GUI

• Java GUI classes:– Container Classes

• JFrame, JPanel, JApplet

– Component Classes• JButton, JTextField, JTextArea,

JComboBox, etc

– Helper Classes• Graphics, Color, Font, Dimension,

etc

• Java GUI Components:– Abstract Windows Toolkit (AWT)

heavyweight components• Button, TextField, TextArea,

ComboBox, etc

– Swing lightweight components• JButton, JTextField, JTextArea,

JComboBox, etcBina Nusantara

Java GUI

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Java GUI

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Java GUI

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Java GUI

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Java GUI

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Java GUI

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• Java also has a very good system for Look and Feels (LAFs) See Additional Material 1

Java

• Java can be downloaded at: http://java.sun.com/javase/downloads/index.jsp

• Java Documentation (help) can be downloaded at: http://java.sun.com/javase/6/docs/api/index.html or http://java.sun.com/javase/downloads/index.jsp

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References

• About the Java Technology. Sun Microsystems. 2008. http://java.sun.com/docs/books/tutorial/getStarted/intro/definition.html

• Characteristics of Java. Liang. 2009. http://www.cs.armstrong.edu/liang/intro6e/JavaCharacteristics.pdf

• The Java Language Environment. Sun Microsystems. 2009. http://java.sun.com/docs/white/langenv/Intro.doc2.html#334

• What Can Java Technology Do?. Sun Microsystems. 2009. http://java.sun.com/docs/books/tutorial/getStarted/intro/cando.html

• Java Technology Concept Map. Sun Microsystems. 2009. http://java.sun.com/new2java/javamap/Java_Technology_Concept_Map.pdf

• Java Technology. University of Wollongong. 2004.• GUI Definition. Linfo. 2004. http://www.linfo.org/gui.html• Graphics Programming. University of Wollongong. 2004.• Graphical User Interface. Wikipedia. 2009.

http://en.wikipedia.org/wiki/Graphical_user_interface• Elements of graphical user interfaces. Wikipedia. 2009.

http://en.wikipedia.org/wiki/Elements_of_graphical_user_interfaces

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References

• java.awt.Component Hierarchy Class Diagram. Falkhausen. 2009. http://www.falkhausen.de/en/diagram/html/java.awt.Components.html

• javax.swing.* Class Diagrams. Falkhausen. 2009. http://www.falkhausen.de/en/diagram/spec/javax.swing.html

• Java Swing Classes. Holub. 1999. http://www.holub.com/goodies/images/swing_component_hierarchy.gif

• Introduction to Java Programming. 7ed. Liang. 2009. p13.• Swing Components and Containment Hierarchy. The Hong Kong Polytechnic

University. 2009. http://www.eie.polyu.edu.hk/~enzheru/gui-0405/final-ppt/java5.ppt

• Java SE Downloads. Sun Microsystems. 2009. http://java.sun.com/javase/downloads/index.jsp

• Java Overview (Documentation). Sun Microsystems. 2009. http://java.sun.com/javase/6/docs/api/index.html